/*
 * Copyright (c) 2017 NCIC, Institute of Computing Technology, Chinese Academy of Sciences
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.ncic.bioinfo.sparkseq.fileio

import java.io.{BufferedReader, InputStreamReader}

import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.fs.{FSDataInputStream, FileSystem, Path}

/**
  * @author wbc
  */
object HDFSReader {
  def apply(path: String): HDFSReader = {
    val hdfs: FileSystem = FileSystem.get(new Configuration)
    val sourcePath = new Path(path)

    val inputStream: FSDataInputStream = hdfs.open(sourcePath)
    val bufferedReader = new BufferedReader(new InputStreamReader(inputStream))
    new HDFSReader(bufferedReader)
  }
}

class HDFSReader(inputStream: BufferedReader) {

  def readLine(): String = {
    inputStream.readLine()
  }

}
